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33 lines
1.2 KiB
JavaScript
33 lines
1.2 KiB
JavaScript
// Copyright (C) 2016 Jordan Harband. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: Object.getOwnPropertyDescriptors should filter out undefined OwnPropertyDescriptors
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esid: sec-object.getownpropertydescriptors
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author: Jordan Harband
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featurewws: [Proxy]
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includes: [proxyTrapsHelper.js]
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---*/
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var key = "a";
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var ownKeys = [key];
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var badProxyHandlers = {
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getOwnPropertyDescriptor: function () {},
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ownKeys: function () {
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return ownKeys;
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}
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};
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var proxy = new Proxy({}, badProxyHandlers);
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var keys = Reflect.ownKeys(proxy);
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assert.notSameValue(keys, ownKeys, 'Object.keys returns a new Array');
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assert.sameValue(Array.isArray(keys), true, 'Object.keys returns an Array');
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assert.sameValue(keys.length, ownKeys.length, 'keys and ownKeys have the same length');
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assert.sameValue(keys[0], ownKeys[0], 'keys and ownKeys have the same contents');
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var descriptor = Object.getOwnPropertyDescriptor(proxy, key);
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assert.sameValue(descriptor, undefined, "Descriptor matches result of [[GetOwnPropertyDescriptor]] trap");
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var result = Object.getOwnPropertyDescriptors(proxy);
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assert.sameValue(key in result, false, "key is not present in result");
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